media: v4l2-fwnode: Check subdev count after checking port

Current implementation of __v4l2_async_notifier_parse_fwnode_endpoints()
checks first whether subdev_count >= subdev_max and only then whether
the port being parsed matches the given port index. This triggers an
error in otherwise valid cases of skipping ports that do not match.

Fix this by moving the check below the port index check.

Fixes: 9ca465312132 ("media: v4l: fwnode: Support generic parsing of graph endpoints in a device")
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index 681b192420d922f7677d32802672c9af2c810e86..fb72c7ac04d48298148a08e4d7c23c35c9451478 100644 (file)
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -458,11 +458,6 @@ static int __v4l2_async_notifier_parse_fwnode_endpoints(
                if (!is_available)
                        continue;
 
-               if (WARN_ON(notifier->num_subdevs >= notifier->max_subdevs)) {
-                       ret = -EINVAL;
-                       break;
-               }
-
                if (has_port) {
                        struct fwnode_endpoint ep;
 
@@ -474,6 +469,11 @@ static int __v4l2_async_notifier_parse_fwnode_endpoints(
                                continue;
                }
 
+               if (WARN_ON(notifier->num_subdevs >= notifier->max_subdevs)) {
+                       ret = -EINVAL;
+                       break;
+               }
+
                ret = v4l2_async_notifier_fwnode_parse_endpoint(
                        dev, notifier, fwnode, asd_struct_size, parse_endpoint);
                if (ret < 0)